#373F9F#373F9F

#373F9F is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.1% C 0.154 H 274.1°. Best body text is #FFFFFF at 8.85:1 contrast (WCAG AA passes).

Color values

HEX	#373F9F
RGB	rgb(55, 63, 159)
HSL	hsl(235, 49%, 42%)
HSV	hsv(235, 65%, 62%)
CMYK	cmyk(65.4%, 60.4%, 0%, 37.6%)
CIE-LAB	lab(31.51, 28.15, -53.26)
CIE-LCH	lch(31.51, 60.24, 297.86°)
OKLab	oklab(42.08% 0.011 -0.1533)
OKLCH	oklch(42.08% 0.154 274.1)
XYZ	xyz(9.6090, 6.8696, 33.6138)
Luminance	0.0687 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373F9F #9F9737

analogous

#37739F #373F9F #63379F

triadic

#373F9F #9F373F #3F9F37

tetradic

#373F9F #9F3773 #9F9737 #379F63

square

#373F9F #9F3773 #9F9737 #379F63

split-complementary

#373F9F #9F6337 #739F37

monochromatic

#181B44 #272D72 #373F9F #5159C3 #7E85D2

Accessibility & contrast

On white

8.85

#373F9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#373F9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373F9F

8.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373F9F	#FFFFFF	#000000	##FFFFFF
##373F9F	1.00	8.85	2.37	8.85
#FFFFFF	8.85	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA2

Deuteranopia (green-blind)

#00469D

Tritanopia (blue-blind)

#005769

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #373f9f;
/* rgb */ color: rgb(55, 63, 159);
/* oklch */ color: oklch(42.1% 0.154 274.1);

Tailwind

colors: {
  custom: {
    50: '#7a74bc',
    500: '#373f9f',
    950: '#000000',
  },
}

SCSS

$custom: #373f9f;
$custom-light: #7a74bc;
$custom-dark: #000000;

JSON

{
  "hex": "#373f9f",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 159
  },
  "hsl": {
    "h": 235.385,
    "s": 48.598,
    "l": 41.961
  },
  "oklch": {
    "l": 0.42075,
    "c": 0.15372,
    "h": 274.1
  },
  "luminance": 0.0687
}

Semantic roles & 50–950 ramp

primary

#373F9F

secondary

#BCB676

accent

#CE50D8

background

#F7F7FB

surface

#EEEDF6

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #373F9F

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →